Here’s an informative write-up on — a now-legacy but still-relevant audio routing tool for Windows, primarily used by musicians, podcasters, and live streamers to work around ASIO’s single-client limitation. What Is ASIO Link Pro? ASIO Link Pro (often abbreviated ALP) is a virtual audio driver and routing matrix for Windows. It allows multiple audio applications to simultaneously access a single ASIO audio interface, and freely route audio channels between programs — something standard ASIO drivers don’t allow natively.
If you find an old copy and get it running, it’s a gem. For everyone else, explore or consider an audio interface with native multi-client drivers (e.g., RME, some MOTU models). Note: ASIO Link Pro is no longer sold officially. Be wary of scam “new license” websites. asio link pro